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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "ui/message_center/views/notifier_settings_view.h"
      6 
      7 #include <set>
      8 #include <string>
      9 
     10 #include "base/strings/string16.h"
     11 #include "base/strings/utf_string_conversions.h"
     12 #include "grit/ui_resources.h"
     13 #include "grit/ui_strings.h"
     14 #include "skia/ext/image_operations.h"
     15 #include "third_party/skia/include/core/SkColor.h"
     16 #include "ui/base/l10n/l10n_util.h"
     17 #include "ui/base/models/simple_menu_model.h"
     18 #include "ui/base/resource/resource_bundle.h"
     19 #include "ui/events/keycodes/keyboard_codes.h"
     20 #include "ui/gfx/canvas.h"
     21 #include "ui/gfx/image/image.h"
     22 #include "ui/gfx/size.h"
     23 #include "ui/message_center/message_center_style.h"
     24 #include "ui/message_center/views/message_center_view.h"
     25 #include "ui/views/background.h"
     26 #include "ui/views/border.h"
     27 #include "ui/views/controls/button/checkbox.h"
     28 #include "ui/views/controls/button/custom_button.h"
     29 #include "ui/views/controls/button/label_button_border.h"
     30 #include "ui/views/controls/button/menu_button.h"
     31 #include "ui/views/controls/image_view.h"
     32 #include "ui/views/controls/label.h"
     33 #include "ui/views/controls/link.h"
     34 #include "ui/views/controls/link_listener.h"
     35 #include "ui/views/controls/menu/menu_runner.h"
     36 #include "ui/views/controls/scroll_view.h"
     37 #include "ui/views/controls/scrollbar/overlay_scroll_bar.h"
     38 #include "ui/views/layout/box_layout.h"
     39 #include "ui/views/layout/fill_layout.h"
     40 #include "ui/views/layout/grid_layout.h"
     41 #include "ui/views/painter.h"
     42 #include "ui/views/widget/widget.h"
     43 
     44 #if defined(USE_AURA)
     45 #include "ui/aura/window.h"
     46 #endif
     47 
     48 namespace message_center {
     49 namespace settings {
     50 
     51 // Additional views-specific parameters.
     52 
     53 // The width of the settings pane in pixels.
     54 const int kWidth = 360;
     55 
     56 // The width of the learn more icon in pixels.
     57 const int kLearnMoreSize = 12;
     58 
     59 // The width of the click target that contains the learn more button in pixels.
     60 const int kLearnMoreTargetWidth = 28;
     61 
     62 // The height of the click target that contains the learn more button in pixels.
     63 const int kLearnMoreTargetHeight = 40;
     64 
     65 // The minimum height of the settings pane in pixels.
     66 const int kMinimumHeight = 480;
     67 
     68 // The horizontal margin of the title area of the settings pane in addition to
     69 // the standard margin from settings::kHorizontalMargin.
     70 const int kTitleMargin = 10;
     71 
     72 }  // namespace settings
     73 
     74 namespace {
     75 
     76 // The amount of built-in padding for the notifier group switcher.
     77 const int kButtonPainterInsets = 5;
     78 
     79 // Menu button metrics to make the text line up.
     80 const int kMenuButtonInnateMargin = 2;
     81 const int kMenuButtonLeftPadding = 12;
     82 const int kMenuButtonRightPadding = 13;
     83 const int kMenuButtonVerticalPadding = 9;
     84 
     85 // Used to place the context menu correctly.
     86 const int kMenuWhitespaceOffset = 2;
     87 
     88 // The innate vertical blank space in the label for the title of the settings
     89 // pane.
     90 const int kInnateTitleBottomMargin = 1;
     91 const int kInnateTitleTopMargin = 7;
     92 
     93 // The innate top blank space in the label for the description of the settings
     94 // pane.
     95 const int kInnateDescriptionTopMargin = 2;
     96 
     97 // Checkboxes have some built-in right padding blank space.
     98 const int kInnateCheckboxRightPadding = 2;
     99 
    100 // Spec defines the checkbox size; the innate padding throws this measurement
    101 // off so we need to compute a slightly different area for the checkbox to
    102 // inhabit.
    103 const int kComputedCheckboxSize =
    104     settings::kCheckboxSizeWithPadding - kInnateCheckboxRightPadding;
    105 
    106 // The menubutton has innate margin, so we need to compensate for that when
    107 // figuring the margin of the title area.
    108 const int kComputedContentsTitleMargin = 0 - kMenuButtonInnateMargin;
    109 
    110 // The spec doesn't include the bottom blank area of the title bar or the innate
    111 // blank area in the description label, so we'll use this as the space between
    112 // the title and description.
    113 const int kComputedTitleBottomMargin = settings::kDescriptionToSwitcherSpace -
    114                                        kInnateTitleBottomMargin -
    115                                        kInnateDescriptionTopMargin;
    116 
    117 // The blank space above the title needs to be adjusted by the amount of blank
    118 // space included in the title label.
    119 const int kComputedTitleTopMargin =
    120     settings::kTopMargin - kInnateTitleTopMargin;
    121 
    122 // The switcher has a lot of blank space built in so we should include that when
    123 // spacing the title area vertically.
    124 const int kComputedTitleElementSpacing =
    125     settings::kDescriptionToSwitcherSpace - kButtonPainterInsets - 1;
    126 
    127 // A function to create a focus border.
    128 scoped_ptr<views::Painter> CreateFocusPainter() {
    129   return views::Painter::CreateSolidFocusPainter(kFocusBorderColor,
    130                                                  gfx::Insets(1, 2, 3, 2));
    131 }
    132 
    133 // EntryView ------------------------------------------------------------------
    134 
    135 // The view to guarantee the 48px height and place the contents at the
    136 // middle. It also guarantee the left margin.
    137 class EntryView : public views::View {
    138  public:
    139   explicit EntryView(views::View* contents);
    140   virtual ~EntryView();
    141 
    142   // views::View:
    143   virtual void Layout() OVERRIDE;
    144   virtual gfx::Size GetPreferredSize() OVERRIDE;
    145   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
    146   virtual void OnFocus() OVERRIDE;
    147   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
    148   virtual bool OnKeyReleased(const ui::KeyEvent& event) OVERRIDE;
    149   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
    150   virtual void OnBlur() OVERRIDE;
    151 
    152  private:
    153   scoped_ptr<views::Painter> focus_painter_;
    154 
    155   DISALLOW_COPY_AND_ASSIGN(EntryView);
    156 };
    157 
    158 EntryView::EntryView(views::View* contents)
    159     : focus_painter_(CreateFocusPainter()) {
    160   AddChildView(contents);
    161 }
    162 
    163 EntryView::~EntryView() {}
    164 
    165 void EntryView::Layout() {
    166   DCHECK_EQ(1, child_count());
    167   views::View* content = child_at(0);
    168   int content_width = width();
    169   int content_height = content->GetHeightForWidth(content_width);
    170   int y = std::max((height() - content_height) / 2, 0);
    171   content->SetBounds(0, y, content_width, content_height);
    172 }
    173 
    174 gfx::Size EntryView::GetPreferredSize() {
    175   DCHECK_EQ(1, child_count());
    176   gfx::Size size = child_at(0)->GetPreferredSize();
    177   size.SetToMax(gfx::Size(settings::kWidth, settings::kEntryHeight));
    178   return size;
    179 }
    180 
    181 void EntryView::GetAccessibleState(ui::AccessibleViewState* state) {
    182   DCHECK_EQ(1, child_count());
    183   child_at(0)->GetAccessibleState(state);
    184 }
    185 
    186 void EntryView::OnFocus() {
    187   views::View::OnFocus();
    188   ScrollRectToVisible(GetLocalBounds());
    189   // We render differently when focused.
    190   SchedulePaint();
    191 }
    192 
    193 bool EntryView::OnKeyPressed(const ui::KeyEvent& event) {
    194   return child_at(0)->OnKeyPressed(event);
    195 }
    196 
    197 bool EntryView::OnKeyReleased(const ui::KeyEvent& event) {
    198   return child_at(0)->OnKeyReleased(event);
    199 }
    200 
    201 void EntryView::OnPaint(gfx::Canvas* canvas) {
    202   View::OnPaint(canvas);
    203   views::Painter::PaintFocusPainter(this, canvas, focus_painter_.get());
    204 }
    205 
    206 void EntryView::OnBlur() {
    207   View::OnBlur();
    208   // We render differently when focused.
    209   SchedulePaint();
    210 }
    211 
    212 }  // namespace
    213 
    214 
    215 // NotifierGroupMenuModel -----------------------------------------------------
    216 
    217 class NotifierGroupMenuModel : public ui::SimpleMenuModel,
    218                                public ui::SimpleMenuModel::Delegate {
    219  public:
    220   NotifierGroupMenuModel(NotifierSettingsProvider* notifier_settings_provider);
    221   virtual ~NotifierGroupMenuModel();
    222 
    223   // ui::SimpleMenuModel::Delegate:
    224   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
    225   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
    226   virtual bool GetAcceleratorForCommandId(
    227       int command_id,
    228       ui::Accelerator* accelerator) OVERRIDE;
    229   virtual void ExecuteCommand(int command_id, int event_flags) OVERRIDE;
    230 
    231  private:
    232   NotifierSettingsProvider* notifier_settings_provider_;
    233 
    234   DISALLOW_COPY_AND_ASSIGN(NotifierGroupMenuModel);
    235 };
    236 
    237 NotifierGroupMenuModel::NotifierGroupMenuModel(
    238     NotifierSettingsProvider* notifier_settings_provider)
    239     : ui::SimpleMenuModel(this),
    240       notifier_settings_provider_(notifier_settings_provider) {
    241   if (!notifier_settings_provider_)
    242     return;
    243 
    244   size_t num_menu_items = notifier_settings_provider_->GetNotifierGroupCount();
    245   for (size_t i = 0; i < num_menu_items; ++i) {
    246     const NotifierGroup& group =
    247         notifier_settings_provider_->GetNotifierGroupAt(i);
    248 
    249     AddCheckItem(i, group.login_info.empty() ? group.name : group.login_info);
    250   }
    251 }
    252 
    253 NotifierGroupMenuModel::~NotifierGroupMenuModel() {}
    254 
    255 bool NotifierGroupMenuModel::IsCommandIdChecked(int command_id) const {
    256   // If there's no provider, assume only one notifier group - the active one.
    257   return !notifier_settings_provider_ ||
    258       notifier_settings_provider_->IsNotifierGroupActiveAt(command_id);
    259 }
    260 
    261 bool NotifierGroupMenuModel::IsCommandIdEnabled(int command_id) const {
    262   return true;
    263 }
    264 
    265 bool NotifierGroupMenuModel::GetAcceleratorForCommandId(
    266     int command_id,
    267     ui::Accelerator* accelerator) {
    268   return false;
    269 }
    270 
    271 void NotifierGroupMenuModel::ExecuteCommand(int command_id, int event_flags) {
    272   if (!notifier_settings_provider_)
    273     return;
    274 
    275   size_t notifier_group_index = static_cast<size_t>(command_id);
    276   size_t num_notifier_groups =
    277       notifier_settings_provider_->GetNotifierGroupCount();
    278   if (notifier_group_index >= num_notifier_groups)
    279     return;
    280 
    281   notifier_settings_provider_->SwitchToNotifierGroup(notifier_group_index);
    282 }
    283 
    284 
    285 // NotifierSettingsView::NotifierButton ---------------------------------------
    286 
    287 // We do not use views::Checkbox class directly because it doesn't support
    288 // showing 'icon'.
    289 NotifierSettingsView::NotifierButton::NotifierButton(
    290     NotifierSettingsProvider* provider,
    291     Notifier* notifier,
    292     views::ButtonListener* listener)
    293     : views::CustomButton(listener),
    294       provider_(provider),
    295       notifier_(notifier),
    296       icon_view_(new views::ImageView()),
    297       name_view_(new views::Label(notifier_->name)),
    298       checkbox_(new views::Checkbox(string16())),
    299       learn_more_(NULL) {
    300   DCHECK(provider);
    301   DCHECK(notifier);
    302 
    303   // Since there may never be an icon (but that could change at a later time),
    304   // we own the icon view here.
    305   icon_view_->set_owned_by_client();
    306 
    307   checkbox_->SetChecked(notifier_->enabled);
    308   checkbox_->set_listener(this);
    309   checkbox_->SetFocusable(false);
    310   checkbox_->SetAccessibleName(notifier_->name);
    311 
    312   if (ShouldHaveLearnMoreButton()) {
    313     // Create a more-info button that will be right-aligned.
    314     learn_more_ = new views::ImageButton(this);
    315     learn_more_->SetFocusPainter(CreateFocusPainter());
    316     learn_more_->set_request_focus_on_press(false);
    317     learn_more_->SetFocusable(true);
    318 
    319     ui::ResourceBundle& rb = ResourceBundle::GetSharedInstance();
    320     learn_more_->SetImage(
    321         views::Button::STATE_NORMAL,
    322         rb.GetImageSkiaNamed(IDR_NOTIFICATION_ADVANCED_SETTINGS));
    323     learn_more_->SetImage(
    324         views::Button::STATE_HOVERED,
    325         rb.GetImageSkiaNamed(IDR_NOTIFICATION_ADVANCED_SETTINGS_HOVER));
    326     learn_more_->SetImage(
    327         views::Button::STATE_PRESSED,
    328         rb.GetImageSkiaNamed(IDR_NOTIFICATION_ADVANCED_SETTINGS_PRESSED));
    329     learn_more_->SetState(views::Button::STATE_NORMAL);
    330     int learn_more_border_width =
    331         (settings::kLearnMoreTargetWidth - settings::kLearnMoreSize) / 2;
    332     int learn_more_border_height =
    333         (settings::kLearnMoreTargetHeight - settings::kLearnMoreSize) / 2;
    334     // The image itself is quite small, this large invisible border creates a
    335     // much bigger click target.
    336     learn_more_->set_border(
    337         views::Border::CreateEmptyBorder(learn_more_border_height,
    338                                          learn_more_border_width,
    339                                          learn_more_border_height,
    340                                          learn_more_border_width));
    341     learn_more_->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
    342                                    views::ImageButton::ALIGN_MIDDLE);
    343   }
    344 
    345   UpdateIconImage(notifier_->icon);
    346 }
    347 
    348 NotifierSettingsView::NotifierButton::~NotifierButton() {
    349 }
    350 
    351 void NotifierSettingsView::NotifierButton::UpdateIconImage(
    352     const gfx::Image& icon) {
    353   bool has_icon_view = false;
    354 
    355   notifier_->icon = icon;
    356   if (!icon.IsEmpty()) {
    357     icon_view_->SetImage(icon.ToImageSkia());
    358     icon_view_->SetImageSize(
    359         gfx::Size(settings::kEntryIconSize, settings::kEntryIconSize));
    360     has_icon_view = true;
    361   }
    362   GridChanged(ShouldHaveLearnMoreButton(), has_icon_view);
    363 }
    364 
    365 void NotifierSettingsView::NotifierButton::SetChecked(bool checked) {
    366   checkbox_->SetChecked(checked);
    367   notifier_->enabled = checked;
    368 }
    369 
    370 bool NotifierSettingsView::NotifierButton::checked() const {
    371   return checkbox_->checked();
    372 }
    373 
    374 bool NotifierSettingsView::NotifierButton::has_learn_more() const {
    375   return learn_more_ != NULL;
    376 }
    377 
    378 const Notifier& NotifierSettingsView::NotifierButton::notifier() const {
    379   return *notifier_.get();
    380 }
    381 
    382 void NotifierSettingsView::NotifierButton::SendLearnMorePressedForTest() {
    383   if (learn_more_ == NULL)
    384     return;
    385   gfx::Point point(110, 120);
    386   ui::MouseEvent pressed(
    387       ui::ET_MOUSE_PRESSED, point, point, ui::EF_LEFT_MOUSE_BUTTON);
    388   ButtonPressed(learn_more_, pressed);
    389 }
    390 
    391 void NotifierSettingsView::NotifierButton::ButtonPressed(
    392     views::Button* button,
    393     const ui::Event& event) {
    394   if (button == checkbox_) {
    395     // The checkbox state has already changed at this point, but we'll update
    396     // the state on NotifierSettingsView::ButtonPressed() too, so here change
    397     // back to the previous state.
    398     checkbox_->SetChecked(!checkbox_->checked());
    399     CustomButton::NotifyClick(event);
    400   } else if (button == learn_more_) {
    401     DCHECK(provider_);
    402     provider_->OnNotifierAdvancedSettingsRequested(notifier_->notifier_id,
    403                                                    NULL);
    404   }
    405 }
    406 
    407 void NotifierSettingsView::NotifierButton::GetAccessibleState(
    408     ui::AccessibleViewState* state) {
    409   static_cast<views::View*>(checkbox_)->GetAccessibleState(state);
    410 }
    411 
    412 bool NotifierSettingsView::NotifierButton::ShouldHaveLearnMoreButton() const {
    413   if (!provider_)
    414     return false;
    415 
    416   return provider_->NotifierHasAdvancedSettings(notifier_->notifier_id);
    417 }
    418 
    419 void NotifierSettingsView::NotifierButton::GridChanged(bool has_learn_more,
    420                                                        bool has_icon_view) {
    421   using views::ColumnSet;
    422   using views::GridLayout;
    423 
    424   GridLayout* layout = new GridLayout(this);
    425   SetLayoutManager(layout);
    426   ColumnSet* cs = layout->AddColumnSet(0);
    427   // Add a column for the checkbox.
    428   cs->AddPaddingColumn(0, kInnateCheckboxRightPadding);
    429   cs->AddColumn(GridLayout::CENTER,
    430                 GridLayout::CENTER,
    431                 0,
    432                 GridLayout::FIXED,
    433                 kComputedCheckboxSize,
    434                 0);
    435   cs->AddPaddingColumn(0, settings::kInternalHorizontalSpacing);
    436 
    437   if (has_icon_view) {
    438     // Add a column for the icon.
    439     cs->AddColumn(GridLayout::CENTER,
    440                   GridLayout::CENTER,
    441                   0,
    442                   GridLayout::FIXED,
    443                   settings::kEntryIconSize,
    444                   0);
    445     cs->AddPaddingColumn(0, settings::kInternalHorizontalSpacing);
    446   }
    447 
    448   // Add a column for the name.
    449   cs->AddColumn(
    450       GridLayout::LEADING, GridLayout::CENTER, 0, GridLayout::USE_PREF, 0, 0);
    451 
    452   // Add a padding column which contains expandable blank space.
    453   cs->AddPaddingColumn(1, 0);
    454 
    455   // Add a column for the learn more button if necessary.
    456   if (has_learn_more) {
    457     cs->AddPaddingColumn(0, settings::kInternalHorizontalSpacing);
    458     cs->AddColumn(
    459         GridLayout::CENTER, GridLayout::CENTER, 0, GridLayout::USE_PREF, 0, 0);
    460   }
    461 
    462   layout->StartRow(0, 0);
    463   layout->AddView(checkbox_);
    464   if (has_icon_view)
    465     layout->AddView(icon_view_.get());
    466   layout->AddView(name_view_);
    467   if (has_learn_more)
    468     layout->AddView(learn_more_);
    469 
    470   Layout();
    471 }
    472 
    473 
    474 // NotifierSettingsView -------------------------------------------------------
    475 
    476 NotifierSettingsView::NotifierSettingsView(NotifierSettingsProvider* provider)
    477     : title_arrow_(NULL),
    478       title_label_(NULL),
    479       notifier_group_selector_(NULL),
    480       scroller_(NULL),
    481       provider_(provider) {
    482   // |provider_| may be NULL in tests.
    483   if (provider_)
    484     provider_->AddObserver(this);
    485 
    486   SetFocusable(true);
    487   set_background(
    488       views::Background::CreateSolidBackground(kMessageCenterBackgroundColor));
    489   if (get_use_acceleration_when_possible())
    490     SetPaintToLayer(true);
    491 
    492   gfx::Font title_font =
    493       ResourceBundle::GetSharedInstance().GetFont(ResourceBundle::MediumFont);
    494   title_label_ = new views::Label(
    495       l10n_util::GetStringUTF16(IDS_MESSAGE_CENTER_SETTINGS_BUTTON_LABEL),
    496       title_font);
    497   title_label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
    498   title_label_->SetMultiLine(true);
    499   title_label_->set_border(
    500       views::Border::CreateEmptyBorder(kComputedTitleTopMargin,
    501                                        settings::kTitleMargin,
    502                                        kComputedTitleBottomMargin,
    503                                        settings::kTitleMargin));
    504 
    505   AddChildView(title_label_);
    506 
    507   scroller_ = new views::ScrollView();
    508   scroller_->SetVerticalScrollBar(new views::OverlayScrollBar(false));
    509   AddChildView(scroller_);
    510 
    511   std::vector<Notifier*> notifiers;
    512   if (provider_)
    513     provider_->GetNotifierList(&notifiers);
    514 
    515   UpdateContentsView(notifiers);
    516 }
    517 
    518 NotifierSettingsView::~NotifierSettingsView() {
    519   // |provider_| may be NULL in tests.
    520   if (provider_)
    521     provider_->RemoveObserver(this);
    522 }
    523 
    524 bool NotifierSettingsView::IsScrollable() {
    525   return scroller_->height() < scroller_->contents()->height();
    526 }
    527 
    528 void NotifierSettingsView::UpdateIconImage(const NotifierId& notifier_id,
    529                                            const gfx::Image& icon) {
    530   for (std::set<NotifierButton*>::iterator iter = buttons_.begin();
    531        iter != buttons_.end();
    532        ++iter) {
    533     if ((*iter)->notifier().notifier_id == notifier_id) {
    534       (*iter)->UpdateIconImage(icon);
    535       return;
    536     }
    537   }
    538 }
    539 
    540 void NotifierSettingsView::NotifierGroupChanged() {
    541   std::vector<Notifier*> notifiers;
    542   if (provider_)
    543     provider_->GetNotifierList(&notifiers);
    544 
    545   UpdateContentsView(notifiers);
    546 }
    547 
    548 void NotifierSettingsView::UpdateContentsView(
    549     const std::vector<Notifier*>& notifiers) {
    550   buttons_.clear();
    551 
    552   views::View* contents_view = new views::View();
    553   contents_view->SetLayoutManager(new views::BoxLayout(
    554       views::BoxLayout::kVertical, settings::kHorizontalMargin, 0, 0));
    555 
    556   views::View* contents_title_view = new views::View();
    557   contents_title_view->SetLayoutManager(
    558       new views::BoxLayout(views::BoxLayout::kVertical,
    559                            kComputedContentsTitleMargin,
    560                            0,
    561                            kComputedTitleElementSpacing));
    562 
    563   bool need_account_switcher =
    564       provider_ && provider_->GetNotifierGroupCount() > 1;
    565   int top_label_resource_id =
    566       need_account_switcher ? IDS_MESSAGE_CENTER_SETTINGS_DESCRIPTION_MULTIUSER
    567                             : IDS_MESSAGE_CENTER_SETTINGS_DIALOG_DESCRIPTION;
    568 
    569   views::Label* top_label =
    570       new views::Label(l10n_util::GetStringUTF16(top_label_resource_id));
    571 
    572   top_label->SetHorizontalAlignment(gfx::ALIGN_LEFT);
    573   top_label->SetMultiLine(true);
    574   top_label->set_border(views::Border::CreateEmptyBorder(
    575       0,
    576       settings::kTitleMargin + kMenuButtonInnateMargin,
    577       0,
    578       settings::kTitleMargin + kMenuButtonInnateMargin));
    579   contents_title_view->AddChildView(top_label);
    580 
    581   if (need_account_switcher) {
    582     const NotifierGroup& active_group = provider_->GetActiveNotifierGroup();
    583     string16 notifier_group_text = active_group.login_info.empty() ?
    584         active_group.name : active_group.login_info;
    585     notifier_group_selector_ =
    586         new views::MenuButton(NULL, notifier_group_text, this, true);
    587     scoped_ptr<views::TextButtonDefaultBorder> selector_border(
    588         new views::TextButtonDefaultBorder());
    589     ui::ResourceBundle* rb = &ResourceBundle::GetSharedInstance();
    590     gfx::Insets painter_insets(kButtonPainterInsets, kButtonPainterInsets,
    591                                kButtonPainterInsets, kButtonPainterInsets);
    592     selector_border->set_normal_painter(views::Painter::CreateImagePainter(
    593         *rb->GetImageSkiaNamed(IDR_BUTTON_NORMAL), painter_insets));
    594     selector_border->set_hot_painter(views::Painter::CreateImagePainter(
    595         *rb->GetImageSkiaNamed(IDR_BUTTON_HOVER), painter_insets));
    596     selector_border->set_pushed_painter(views::Painter::CreateImagePainter(
    597         *rb->GetImageSkiaNamed(IDR_BUTTON_PRESSED), painter_insets));
    598     selector_border->SetInsets(gfx::Insets(
    599         kMenuButtonVerticalPadding, kMenuButtonLeftPadding,
    600         kMenuButtonVerticalPadding, kMenuButtonRightPadding));
    601     notifier_group_selector_->set_border(selector_border.release());
    602     notifier_group_selector_->SetFocusPainter(scoped_ptr<views::Painter>());
    603     notifier_group_selector_->set_animate_on_state_change(false);
    604     notifier_group_selector_->SetFocusable(true);
    605     contents_title_view->AddChildView(notifier_group_selector_);
    606   }
    607 
    608   contents_view->AddChildView(contents_title_view);
    609 
    610   size_t notifier_count = notifiers.size();
    611   for (size_t i = 0; i < notifier_count; ++i) {
    612     NotifierButton* button = new NotifierButton(provider_, notifiers[i], this);
    613     EntryView* entry = new EntryView(button);
    614 
    615     // This code emulates separators using borders.  We will create an invisible
    616     // border on the last notifier, as the spec leaves a space for it.
    617     scoped_ptr<views::Border> entry_border;
    618     if (i == notifier_count - 1) {
    619       entry_border.reset(views::Border::CreateEmptyBorder(
    620           0, 0, settings::kEntrySeparatorHeight, 0));
    621     } else {
    622       entry_border.reset(views::Border::CreateSolidSidedBorder(
    623           0,
    624           0,
    625           settings::kEntrySeparatorHeight,
    626           0,
    627           settings::kEntrySeparatorColor));
    628     }
    629     entry->set_border(entry_border.release());
    630     entry->SetFocusable(true);
    631     contents_view->AddChildView(entry);
    632     buttons_.insert(button);
    633   }
    634 
    635   scroller_->SetContents(contents_view);
    636 
    637   contents_view->SetBoundsRect(gfx::Rect(contents_view->GetPreferredSize()));
    638   InvalidateLayout();
    639 }
    640 
    641 void NotifierSettingsView::Layout() {
    642   int title_height = title_label_->GetHeightForWidth(width());
    643   title_label_->SetBounds(settings::kTitleMargin,
    644                           0,
    645                           width() - settings::kTitleMargin * 2,
    646                           title_height);
    647 
    648   views::View* contents_view = scroller_->contents();
    649   int content_width = width();
    650   int content_height = contents_view->GetHeightForWidth(content_width);
    651   if (title_height + content_height > height()) {
    652     content_width -= scroller_->GetScrollBarWidth();
    653     content_height = contents_view->GetHeightForWidth(content_width);
    654   }
    655   contents_view->SetBounds(0, 0, content_width, content_height);
    656   scroller_->SetBounds(0, title_height, width(), height() - title_height);
    657 }
    658 
    659 gfx::Size NotifierSettingsView::GetMinimumSize() {
    660   gfx::Size size(settings::kWidth, settings::kMinimumHeight);
    661   int total_height = title_label_->GetPreferredSize().height() +
    662                      scroller_->contents()->GetPreferredSize().height();
    663   if (total_height > settings::kMinimumHeight)
    664     size.Enlarge(scroller_->GetScrollBarWidth(), 0);
    665   return size;
    666 }
    667 
    668 gfx::Size NotifierSettingsView::GetPreferredSize() {
    669   gfx::Size preferred_size;
    670   gfx::Size title_size = title_label_->GetPreferredSize();
    671   gfx::Size content_size = scroller_->contents()->GetPreferredSize();
    672   return gfx::Size(std::max(title_size.width(), content_size.width()),
    673                    title_size.height() + content_size.height());
    674 }
    675 
    676 bool NotifierSettingsView::OnKeyPressed(const ui::KeyEvent& event) {
    677   if (event.key_code() == ui::VKEY_ESCAPE) {
    678     GetWidget()->Close();
    679     return true;
    680   }
    681 
    682   return scroller_->OnKeyPressed(event);
    683 }
    684 
    685 bool NotifierSettingsView::OnMouseWheel(const ui::MouseWheelEvent& event) {
    686   return scroller_->OnMouseWheel(event);
    687 }
    688 
    689 void NotifierSettingsView::ButtonPressed(views::Button* sender,
    690                                          const ui::Event& event) {
    691   if (sender == title_arrow_) {
    692     MessageCenterView* center_view = static_cast<MessageCenterView*>(parent());
    693     center_view->SetSettingsVisible(!center_view->settings_visible());
    694     return;
    695   }
    696 
    697   std::set<NotifierButton*>::iterator iter =
    698       buttons_.find(static_cast<NotifierButton*>(sender));
    699 
    700   if (iter == buttons_.end())
    701     return;
    702 
    703   (*iter)->SetChecked(!(*iter)->checked());
    704   if (provider_)
    705     provider_->SetNotifierEnabled((*iter)->notifier(), (*iter)->checked());
    706 }
    707 
    708 void NotifierSettingsView::OnMenuButtonClicked(views::View* source,
    709                                                const gfx::Point& point) {
    710   notifier_group_menu_model_.reset(new NotifierGroupMenuModel(provider_));
    711   notifier_group_menu_runner_.reset(
    712       new views::MenuRunner(notifier_group_menu_model_.get()));
    713   gfx::Rect menu_anchor = source->GetBoundsInScreen();
    714   menu_anchor.Inset(
    715       gfx::Insets(0, kMenuWhitespaceOffset, 0, kMenuWhitespaceOffset));
    716   if (views::MenuRunner::MENU_DELETED ==
    717       notifier_group_menu_runner_->RunMenuAt(GetWidget(),
    718                                              notifier_group_selector_,
    719                                              menu_anchor,
    720                                              views::MenuItemView::BUBBLE_ABOVE,
    721                                              ui::MENU_SOURCE_MOUSE,
    722                                              views::MenuRunner::CONTEXT_MENU))
    723     return;
    724   MessageCenterView* center_view = static_cast<MessageCenterView*>(parent());
    725   center_view->OnSettingsChanged();
    726 }
    727 
    728 }  // namespace message_center
    729